Mercury Smartcraft Fault Codes List -
| Code | SPN | FMI | Description | |------|-----|-----|-------------| | 32-1 | 155 | 0 | Crankshaft position sensor – no signal | | 33-1 | 164 | 0 | Camshaft position sensor – signal loss | | 44-1 | 1376 | 3 | Injector circuit – cylinder 1 open/shorted | | 44-2 | 1376 | 4 | Injector circuit – cylinder 1 grounded | | 46-1 | 1381 | 3 | Ignition coil – primary circuit failure | | 49-1 | 1341 | 3 | Fuel pump relay – circuit fault | | 91-1 | 1344 | 2 | Water in fuel sensor – detected (drain water separator) |
| Fault Code | Description | Typical Cause / Action | | :--- | :--- | :--- | | | Fuel Pressure Sensor | Pressure out of range. Indicates failing low-pressure fuel pump or clogged fuel filter. | | Code 12 | Manifold Absolute Pressure (MAP) | Vacuum leak or faulty sensor. Engine will run rich or lean. | | Code 13 | Oxygen (O2) Sensor | (Common on later 4-stroke models) Sensor not switching. Indicates lean/rich condition or bad sensor. | | Code 14 | Intake Air Temperature (IAT) | Open or short. Engine may idle rough due to incorrect fuel trimming. | | Code 15 | High Fuel Pressure | Faulty high-pressure pump (Verado) or regulator issue. | mercury smartcraft fault codes list
Mercury SmartCraft fault codes provide critical diagnostic information about your engine's health, ranging from minor sensor glitches to severe mechanical failures. These codes are typically displayed on your SmartCraft gauges or can be retrieved using a diagnostic scanner. | Code | SPN | FMI | Description
Return to port immediately; check alternator and battery connections. Low Battery Voltage : Voltage dropped below critical levels. Engine will run rich or lean
Fault codes are typically categorised by the severity of the issue, ranging from minor sensor glitches to critical mechanical failures that trigger the to limit power. Code / Fault Meaning & Possible Cause Recommended Action Code 1 High Battery Voltage : System detects over-charging.
This list is for reference purposes. Always consult the official Mercury Marine Service Manual for your specific engine serial number before performing repairs. Electrical diagnostics should be performed by a certified technician.